n=$counter
image=0
math=1
questiontype=0
colls=35
rows=6
math=0
var5=6
var4=1
keuze=!randitem 1,2

!if $level = 0
    R=$counter
!else
    R=$level
!endif    

!if $subject=1
    variabelen=0
    breuken=0
    steps=0
!endif

!if $variabelen=1
    var1=!randitem a,b,c,d,f,x,y,z,p,g,k,t,r,n,m
!else
    var1=x
!endif
varlist=$var1
mathviewpanel=$module_title:->:/:*:-:+
question$n=!record 30 of lang/remarks.$taal
#@ Los de volgende vergelijking op <br>(Bereken dus de waarde van de letter)
!if $steps=1
    checkfile=exos/checkfile4.proc
    tekst=!record 31 of lang/remarks.$taal
    #@En laat ook een paar tussenstappen zien...
    question$n=$(question$n)<br>$tekst
!else
    checkfile=exos/checkfile1.proc
!endif

!if $breuken=1
    !if $R=1 
	# a + x = 0 => x=-a
        Te=!randint 1,30
	No=!randint 20,50
	pm=!randitem -1,1
	aa=!exec pari A=-1*($pm*($Te/$No))\
	printtex(A)\
	printtex($pm*($Te/$No))
	
	answer$n=!line 1 of $aa
	GG=!line 2 of $aa
	a=!line 3 of $aa
	formula$n=$a + $var1 \,\,\,=\,\,\,0 
    	texanswer$n=$var1 \,\,=\,\, 0 - $a \Longrightarrow  $var1 \,\,=\,\, $GG 
     !exit
    !endif

    !if $R=2 
	# a - x - b =0 => x=a-b
        Te=!randint 1,30
	No=!randint 20,50
	b=!randitem 2,3,4,5,6,7,8,9	
	aa=!exec pari A=($Te/$No) - $b\
	printtex(A)\
	printtex($Te/$No)
	
	answer$n=!line 1 of $aa
	GG=!line 2 of $aa
	a=!line 3 of $aa	
    	formula$n=$a - $var1 - $b \,\,\,=\,\,\,0 
	texanswer$n= $a - $b = $var1 \Longrightarrow   $var1 \,\,=\,\, $GG	    
     !exit
    !endif
	
    !if $R=3
	# ax-b=0 => x=b/a
	a=!randitem 2,3,4,5,6,7,8,9,10
	b=!randitem 1/2,2/3,3/4,4/5,5/6,6/7,1/4,1/3,1/5,2/5,3/5,4/5,5/6
	aa=!exec pari A=($b)/$a\
	printtex(A)\
	printtex($b)
	
	answer$n=!line 1 of $aa
	GG=!line 2 of $aa
	b=!line 3 of $aa
	formula$n=$a \cdot $var1 - $b \,\,\,=\,\,\,0 
	texanswer$n=$a\cdot $var1 \,\,\,= $b \Longrightarrow   $var1 \,\,\,=\,\,\, $GG
     !exit
    !endif

    !if $R>3 
	a=!randitem 2,3,4,5,6,7,8,9,10
	answer$n=!randitem 2,3,4,5,6,7,8,9
	b=$[$a*$(answer$n)]
	d=!randitem 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
	formula$OBn=\frac{$a \cdot $var1}{$d} - \frac{$b}{$d} \,\,\,=\,\,\, 0
	texanswer$n=$a\cdot $var1 \,\,\,= $b \Longrightarrow   $var1 \,\,\,=\,\,\, $(answer$n)
     !exit
    !endif
!else
    !if $R=1 
        a=!randint 10,100
        !if $keuze=1		
	    formula$n=$a + $var1 \,\,\,=\,\,\,0 
    	    answer$n=$[-1*$a]
    	    texanswer$n=$var1 \,\,=\,\, 0 - $a \Longrightarrow  $var1 \,\,=\,\, $(answer$n) 
	!else
	    a=$[-1*$a]
	    formula$n=$a - $var1 \,\,\,=\,\,\,0 
	    answer$n=$a
	    texanswer$n= - $var1 \,\,=\,\,0 - $a \Longrightarrow   $var1 \,\,=\,\, $a 	    
	!endif
     !exit
    !endif

    !if $R=2 
	a=!randint 10,100
	b=!randitem 2,3,4,5,6,7,8,9	
	!if $keuze=1
	    formula$n=$a + $var1  - $b\,\,\,=\,\,\,0 
	    answer$n=$[-1*($a - $b)]
	    texanswer$n=$var1 \,\,=\,\, 0 - $[$a - $b] \Longrightarrow  $var1 \,\,=\,\, $(answer$n)
	!else
    	    formula$n=$a - $var1 - $b \,\,\,=\,\,\,0 
	    answer$n=$[$a - $b]
	    texanswer$n= - $var1 \,\,=\,\,0 - $[$a - $b] \Longrightarrow  $var1 \,\,=\,\, $(answer$n)	    
	!endif
     !exit
    !endif
	
    !if $R>2
	a=!randitem 2,3,4,5,6,7,8,9,10
	!if $R>3 
	    a=$[-1*$a]
	!endif	
	answer$n=!randitem 2,3,4,5,6,7,8,9
	b=$[$a*$(answer$n)]
	formula$n=$a \cdot $var1 - $b \,\,\,=\,\,\,0 
	texanswer$n=$a\cdot $var1 \,\,\,= $b \Longrightarrow   $var1 \,\,\,=\,\,\, $(answer$n)
     !exit
    !endif
!endif

